An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth âs surface. They are among the flattest, smoothest and least explored regions on Earth.
Jim Beckwourth. On this day in 1844, Jim Beckwourth discovered a path through the Sierra Nevada Mountains that now bear his name. Beckwourth Pass on U.S. Alt 40 between Reno, Nevada and Sacramento, California made overland travel to the gold fields of California. Tweet.
During the early 1850s, many surveying parties passed through the vicinity of present-day Beaumont in search of a pass that would connect the east to the Pacific Ocean. The San Gorgonio Pass was discovered in 1853 by a surveying expedition under Lieutenant R.S. Williamson, who was sent by the United States government.